Paper-coating machine.



l PATBNTBD 11113.31, 190s. Y c..r. s1?AU-LDING.

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PAPER GO-ATING MACHINE.

Arrmonl'on rnfnn n'ov. 1e.` 14901.

jurious to the paper.

CHARLES F. srAU'LDING, oF TARaYToWN, NEW YORK.

PAPER-COATING MACHINE.

`'Specification of Lettera Patent.

Patented March 31, 1908.

Application filed November 16, 1907. Serial No. 402,453.

To all whomit may concern:

' Be it known that I, CHARLES F. SPAULDING, a citizen of the United States,- residing at Tarrytowmin the county of Vestchester and State of New York, have invented certain new and useful Improvements in Paper-Coating Machines, of Which the following' is a specification. A

This invention relates to apparatus of that class employed in the manufacture of coated pa er.

n the manufacture of double coated paper, that is to say, paper having a film or coat of color or other material onv each side, a number of serious difficulties have been experienced. In some of the earlier processes a coating was first placed on one side f the paper `and `then dried by heating it, after which. the process was re eated for the opposite side, but the dou le heating is in- Jurious to the. paper; the coloring of the two sides lacks uniformity, and the process is expensive. In other cases, and, as at present generally practicedL thecoating is applied to both sides of the paper by brushes or e' uivalent devices and one ofthe surfaces W e sftill moist passes over a roll or cylinder, the adhesive nature of the coating being utilized as a means for transmitting motion from the web of pa er to the roll, but in a short time the c Y inderv becomes coated, smearing the surface of the aper. The cylinder-coating, moreover, will) harden in spots forming a rough surface that is in- A further Adisadvantage in thisform of machine is that during stops the softened paper Webs will adhere tothe roll and break when the machineA is again started. It is further found that a sufiicientand well distributed coating cannot be successfully applied b brushes or like means, owing tot e clogging of the bristles at 4different points and` the diiculty encountered in keepin the bristles from adhering together in bunc es.

The resentinvention aims to overcome all of t ese disadvanta es and to provide ay machine by Which bot sides of the paper may be effectualllyl7 coated during a single passage and in W ich only a single drying operation. is necessar A further object ofy the invention is to provide a machine in which gravity coatmgdistributing members are empio ed to deliver the coating tol both sides o theweb,

While the guiding'devices. are so arranged that they will engage only the uncoated portion of the Webs.

A still further object of the invention is to provide a machine in which positive driving or feedin movement is imparted to the Webs from riven drums o1' cylinders that engage only the raw or uncoated surface-of such webs. .1

A still furtherobject of the invention isto' provide 'a novel form of distributing plate in which the discharge edge of the late Ee divided intoa plurality of llat co ecting and dripping points to insure uniformity of discharge throughout the entire Width of' the p ate.

I A still further object of the invention is to provide an improved means for mounting and actuating the jiggers or distributing brushes.

With these and other objects in view, as

Will `more fully hereinafter a pear, the inventionn consists in the nove 'construction and arrangement of partshereinafter described, illustrated in the accompanying drawings, and particularly pointedk out in the appended. claims, it being understoodY that various changes in the forms, structure and proportions of parts may be made without de arting from the invention.

In t ie'accompanying drawing: Figure 1 is a side elevation, partly in the nature of a dia gram, illustrating a coating machine constructed in accordance with the invention. Fig. 2 is a detail view showing the mechanism for actuating Ythe jiggers or distributing brushes.

Fig. 3 is a detail perspective view of one of the gravity distributing plates.

Similar numerals of reference are employed to indicate corresponding parts throughout the several figures of the'drawing.

The Working parts of the machme are sup-l orted in a suitable frame 9 having bearings fbr the reception of a pair ofshafts 10, 1 1, the axes of which are disposed in different vertical and horizontal planes. These shafts carry intermeshing gears 12 ofuniform diameter and the'teeth of the lower ear are engaged by a pinion 13 on a main s aft 14 also journaled inthe frame.

. The shaft 14 is provided with a belt Wheel 15 over which passes a belt 1,6 drivenfromv anv suitable source of power.

Secured to the shafts 10 and 11 are drums or cylindersl? and 18, respectively, these cylinlos ' ders being ofthe same diameter and driven at the same surface speed.

At one end of the frame are supports for a paper roll 19 from which is fed the webs ot paper to be coated, the Webs passing u p over a preliminary guiding roller 20 that is supported by brackets 21 on the mam frame and being thence guided around the cylinders 17 and 18 in the course indicated by the arroii s. Between the upper and lower cylinders lthe webs are guided y.in a horizontal or approximately horizontal `lane l and after passing below the lower cylinder are guided in a second and lov; er horizontal plane to any suitable take up mechanism (not shown), the webs being held under such tension that the cylinders will act as' feeders until said we'ls passes from engagement n ith the lowerinost-cyhnder. u

Mounted above the cylinder 18 1s a box or trough 22 arranged to contain the coloring or other material with which the paper is to be coated and dipping into this coating box is a vi alloriy er or fountain roll 22'L1 which may be revolvedin any suitable manner and at a speed dependent upon the character of the v erh to ce performed.

Journaled in the frame is a spindle 23 that is disposed in front of the coating box and carries a doctor or distributing plate 241. The upper edge of this plate is perfectly. straight and smooth and it may be ,adjusted relatively to the roller 22 by 'turning the s indle 23 on its axis. The function of the p ate 24 is to scrape off the film of color or coating material w iich adheres to the surface of the roll 22, and this coating material flows down the plate by gravity and falls upon the upper .surface of the web of paper as thev latter is passing between thetwo cylinders 17 and 1S.

lin the devices of' this general class the distributing plates are' usually provided with numerous parallel grooves for the purpose of dividingthe .film Vof coating material into a large number of minute streams that fall on the paper.l These grooves, however, frequently become choked or clogged and uniformy distribution of the material becomes iiiipracticable. In thel present instance the plate is perfectly plain and smooth down to the ower edge and this edge is serrated or divided into numerous teeth or tines each of which acts as a collecting and dripping point for the coating material. The uantity of liquid used is such that there will be no tendency .to iiow between the teeth, but theA` liquid will flow do'wn and collect at the points or teeth and if one is full, the liquid will seek another so that all will be kept supplied and the distribution will be uniform throughout the entire width of the plate. The coating material drops onto the webs and if there is any surplus, the excess Will flow over the sides of the websand will be caught by a p vkept clean and free from accumulations. the web passes around the lower cylinder itis a lower coating box 21.

Extending radially from the axis of the' shaft 11 vis a frame 26 which supports a brush` 27 engaging the coated surface of the web. This brush is reciprocated transversely of the direction of travel of the web and serves to more fully distribute the coating over the sure face. It will be noted that the web does not receive any coating un bil it passes beyond the upper cylinder 17, and that the uncoated side of the web remains in contact with the lower cylinder 18, so that both cylinders are As turned, the coated face being below and the uncoated'face above. This uncoated face receives a coating from the box 21. vitliin the box is a roller 22 against which bears a distributing plate 24" of the same construction and operating in the saine manner as the upper plate. Any excess coating from the lower box will flow over the edge of the webV into a trough 30 from whence it may be directed into any suitable receptacle. web ot paper, coated on both sides, is now led between a number of sets of brushes or jiggersJ 31 which reciprocate in planes transverse to the direction of travel of the web and spread the coating. The 'iggers are operated from the main shaft 1 4- t roughmiter gears 31, a shaft 32 and cams 33, there being as many cams as there are `sets of brushes.

Projecting from one of the side bars of the frame 10 are pairs of spaced vert-ical osts 34 The united at their upper and lowerend's y cross i bars 35, and each cross bar has a central open-` ing for the passage of a-screw 36'. The cross bars serve as guides for cross heads or blocks 37 having threaded openings for the passage ot' the screws, so that by turning -the latter the blocks may be vertically adjusted. Each block has guiding openings for the reception of a pair of arms 39 projecting from the end rt a brush head 40 and the brushes are ar ranged to recipro'cate, their bristles engaging the opposite faces of Jthe coated web.

Projecting from the side bar of the frame is a bracket 41 to which is pivoted a lever 42,' and in the upper andlower ends of this lever are pivoted the outerends of a pair of arms 13. The inner ends of the arms are secured to blocks 114 on the brush heads so that as the' lever cscillates, the brushes will be moved in opposite directions. The lower arm of the lever is enlarged. and -is provided with an opening 45 for the reception of the cam33, the cam being i'n the nature of an eccentric and the space between the. side walls of the open-l ing being the same as the diameter of the eccentric so that there Will ment ih both directions.

Having thus described my invention what I claim isz- 1|. in a coating machine, a plurality of be positive move web turning and guiding means arranged to engage only the uncoated portion ci tliewr'ib,

and a pair `of .t

1y coatii g--c'listiibnting members under Which tmiie two sides of Web are successively directed in substantially horizontal planes as leaves the turning and guiding means. V

` 2. In a coatingdnachine, a pair of gravity l coating-'distributing members, 4means for guiding one side, ofthe'web to be coated unn der one of said members, and means forl turning the web and guiding.thev opposite side. thereof under the .other member, recipabove that portion of the Web in the lower rocating brushes for acting on both coated surfaces all lof saidvweb .turning and guiding means being arranged to engage only the .uncoated surfaces of the webl said surfaces be ing' thereby kept free from contact until acted on ,by the brushes. I 1 ff 3. In a 'coating' machine, Web turning lmember around yjlich the under surface of lthe web is e ind nncoated from an upper, horizontal p ane to a lower horizontalplane, andl a pair of gravity coating-distributing members disposedI one'above that portion of. thevveb in the upper plane andthe otherf plane.

. 4. lIn a coating machine, a frame, a pair ofy vvebl guiding cylinders having their axes in dil'erent`horizontal and'vertical planes and inders to feed the web troni the lower portion both arranged to engage the iincoated portion of the Web, means tor revolving the cylating beyond the discharge sides of the `cylinders respectively.

. ln a coatinginachine', a frame, a pair of.

she-tits `journaled' therein and having their.

aires in diilerent horizontal and .vertical pl nes, cylinders on vsaid shafts, gears con.

iiecting the shafts, a driving pinion inter# meshing with one of said gears, andv gravity coating-distrihuters located beyond the dis-4 charge side of each, cylinder respectively.

7. In a coating machine,l a. pair of shafts, gears connecting the shafts, cylinders mountn 'ed on the shafts, a driving pinion intermeshing with one of the gears, coating'hoxes arv .y

ranged; in d iiferent' horizontal planes, means for delivering the coating material from the lboxes onto theI web, means for directing the excess material from the upper box into the f lower box, and a reciprocatory brush. ar-

Webbeyond the first box.

rane-ed .to engage the'coated surface'ofthe- 8. ln 'ya coating machine, a coating box, a

roller'there'in, an adjustable plate havin its upper edge engaging said roller, said'p ate vhaving a smooth outer surface for the' gravi- .tational iloW of thefilm yremoved' from .the

roller, the lower 'edgeofjthe platebeingdivided into a Vseries of collecting and dripping points. l f

9. ln acoating machine, a frame, a air of"l reciprocatory brushes, spaced vertice posts `carried by thefranie, vertically adjustablel blocks on said posts, bars projecting from the brushes and extending through guiding o en-' ings in said blocks, a rocking lever carrie by the frame and provided withy a can'i receiving opening, an'operating cani arranged therein,

and operating bars connecting the `brushes to y the lever. l

In testimony whereof l ax my signature, in presence of two witnesses. p llAS. F. SPAULDING.- Witnesses CHARLES D. MiLLA'nn, Maar B. KINGLA. 

